Low pressure and pump pressure adjuster makes no difference

To troubleshoot the low sump pressure fault, check first the filter, suction line, and pump. Make sure the filter is clean, the suction line is clear, and the pump isn't seized. If these have all been checked and functioning properly, the next step is to check the differential pressure switch. This allows the pump to switch off when the sump pressure is too low or too high. If the differential pressure switch needs to be adjusted, look for the adjustment nut on the switch and for instructions on adjusting the switch in the owner's manual

this indicates that there is a failure of the non-return valve between the pump and the control unit. The residual pressure ( that what holds the switch in the off position) is draining away -probably back through the pump non-return valve or there is a hole in the pipes after the unit and the pump is constantly switching on to maintain pressure.
If you have a bowl and diaphragm that you can pump up with a air pump to get a set pressure to operate at it is possible that the set pressure on the diaphragm is too low.
As a point of interest there are better control units that do away with the bowl operation. they turn on quicker, self adjust to the number of taps on line, smaller and more reliable They also do not have the noticeable drop in pressure until the pump starts as they are almost instant reaction to pressure difference.

reduce the thickness thermostat that initiates the timer to minimum, then increase until good ice made.

pressure control valves are non adjustable
They operate to unload the pump when the trigger is released
What can vary pressure is the jet size at the end of the wand
The screw and nut on the valve is only to regulate the stop/start pressure as the trigger is pressed/ released
low pressure at the wand jet can be from low water supply to the pump or pump internal problems

These pumps can be wired to operate on either 115 or 230 volts. This shouldn't be an issue if it was previously working. If a new installation, make sure it isn't be connected for 230 volt operation and supplied with 115 volts - and of course; vice versa. Correct improper wiring before continuing. It is very possible that the motor has catastrophically failed due to incorrect voltage being supplied - hopefully this isn't the case.

Check and replace / reset any open fuses / tripped circuit breakers. and try again.

These pumps are often operated automatically via pressure switch. If the correct power is available to the pump it may be a problem with the pressure switch. There are many different types of pressure switches so it will be difficult to go beyond what I have told you already. You might want to see if you can locate a pressure adjustment screw and try varying it to see if it has been set too low to allow the pump to come on.

If no luck, tell me what the application for the pump is (point well pump, etc.) and what controls the pump (pressure switch, etc.). Provide the make and model of the control device and any visible settings. Do not remove any covers unless the power is first shut off.

I hope this helps & good luck!

hi, maybe your grind is set too fine. If the grind is too fine, the water cant flow through. If your single shot flows ok, then id make the grind a bit coarser. Have you changed the blend. All blends are different. If you have not changed anything, then your pump pressure could be low. There is no adjustment for the pump. Replace pump if pressure is low.

There will usually be a difference in water pressure between the pump cycling on and off. The larger, spring loaded nut near the end of the case is the shut off adjustment. The small spring loaded nut next to it is for setting the differential between the stopping point and when the pump will restart. Getting these two points as close as possible will minimize the pressure differential while doing yard work but short cycling is not good for motors of any kind.

if you want more pressure out your hose use the outlet pressure regulator. if you want more or less air put in the tank you can try to adjust the pressure switch. different models are adusted in different ways. there may be a screw between the points that make contact. adjust it up or down to see the direction you need to go. some of these switches won't let you adjust or id they do it won't be much.

check strainer and skimmer for excess debris that will cause low flow to heater thus not engaging pressure switch.make sure filter is clean.if all of these check out ,take continuity reading on pressure switch.if no continuity,try to adjust pressure switch if it wont adjust ,its faulty.take extreme caution when adjusting make htr will shut down when pump goes off